/* 烈风云 (liefenyun.autos) 现代化卡片式落地页与文章系统视觉设计样式
   设计风格参考：NextDevTpl / Clean Modern Emerald & Light Neutral Aesthetic
*/

:root {
  --bg-main: #fcfdfd;
  --bg-subtle: #f4f6f5;
  --bg-card: #ffffff;
  --bg-card-hover: #fafcfb;
  
  --primary: #047857;
  --primary-hover: #065f46;
  --primary-light: #ecfdf5;
  --primary-border: #a7f3d0;
  
  --accent: #10b981;
  --text-main: #0f172a;
  --text-muted: #475569;
  --text-light: #64748b;
  
  --border-color: #e2e8f0;
  --border-light: #f1f5f9;
  
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.06), 0 4px 6px -2px rgba(0, 0, 0, 0.03);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 10px 10px -5px rgba(0, 0, 0, 0.03);
  
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-family);
  background-color: var(--bg-main);
  color: var(--text-main);
  line-height: 1.65;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* 页面背景微观网格阵列 */
.bg-grid-pattern {
  background-image: radial-gradient(rgba(4, 120, 87, 0.08) 1px, transparent 1px);
  background-size: 24px 24px;
}

/* 基础通用布局 */
.container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
}

a {
  color: inherit;
  text-decoration: none;
}

ul, ol {
  list-style: none;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* 导航栏设计 */
.header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(252, 253, 253, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  transition: var(--transition);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
  color: var(--text-main);
}

.brand-icon {
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  box-shadow: 0 4px 10px rgba(4, 120, 87, 0.25);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: var(--transition);
}

.nav-link:hover {
  color: var(--primary);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 22px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  transition: var(--transition);
  cursor: pointer;
  border: 1px solid transparent;
}

.btn-primary {
  background-color: var(--primary);
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(4, 120, 87, 0.3);
}

.btn-primary:hover {
  background-color: var(--primary-hover);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(4, 120, 87, 0.4);
}

.btn-secondary {
  background-color: var(--bg-card);
  color: var(--text-main);
  border-color: var(--border-color);
}

.btn-secondary:hover {
  background-color: var(--bg-subtle);
  border-color: #cbd5e1;
}

/* HERO 区块设计 */
.hero-section {
  padding: 80px 0 60px;
  position: relative;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background-color: var(--primary-light);
  border: 1px solid var(--primary-border);
  border-radius: var(--radius-full);
  color: var(--primary);
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 24px;
}

.hero-title {
  font-size: 3.2rem;
  line-height: 1.15;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--text-main);
  margin-bottom: 20px;
}

.hero-title span {
  color: var(--primary);
}

.hero-desc {
  font-size: 1.125rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 36px;
}

.hero-btns {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 40px;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  padding-top: 32px;
  border-top: 1px solid var(--border-color);
}

.stat-item-num {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-main);
}

.stat-item-label {
  font-size: 0.825rem;
  color: var(--text-light);
}

/* HERO 卡片面板 */
.hero-card-panel {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-xl);
  position: relative;
}

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border-light);
}

.panel-title {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 8px;
}

.status-dot {
  width: 8px;
  height: 8px;
  background-color: var(--accent);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--accent);
}

.panel-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}

.metric-card {
  background-color: var(--bg-subtle);
  padding: 14px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-light);
}

.metric-val {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--primary);
}

.metric-label {
  font-size: 0.75rem;
  color: var(--text-light);

}

.panel-graph {
  height: 140px;
  background: linear-gradient(180deg, rgba(4, 120, 87, 0.06) 0%, rgba(255, 255, 255, 0) 100%);
  border-radius: var(--radius-md);
  border: 1px dashed var(--primary-border);
  display: flex;
  align-items: flex-end;
  padding: 16px;
  margin-bottom: 16px;
}

.graph-svg {
  width: 100%;
  height: 100%;
}

.nodes-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.node-pill {
  padding: 4px 10px;
  background-color: var(--primary-light);
  color: var(--primary);
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
}

/* 通用区块标题 */
.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 56px;
}

.section-tag {
  display: inline-block;
  padding: 4px 12px;
  background-color: var(--primary-light);
  color: var(--primary);
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.section-title {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* 核心优势区块 */
.features-section {
  padding: 90px 0;
  background-color: #ffffff;
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--bg-main);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 32px 24px;
  transition: var(--transition);
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-border);
}

.feature-icon {
  width: 50px;
  height: 50px;
  background-color: var(--primary-light);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 1.5rem;
  margin-bottom: 20px;
}

.feature-h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 10px;
}

.feature-desc {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* 套餐价格区块 (匹配参考图1与绿白基调) */
.pricing-section {
  padding: 90px 0;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.pricing-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 28px 20px;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  position: relative;
}

.pricing-card.featured {
  border: 2px solid var(--primary);
  box-shadow: var(--shadow-lg);
}

.pricing-card.featured::before {
  content: "最受欢迎";
  position: absolute;
  top: -12px;
  right: 20px;
  background-color: var(--primary);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 2px 10px;
  border-radius: var(--radius-full);
}

.plan-name {
  font-size: 1.2rem;
  font-weight: 800;
  margin-bottom: 8px;
}

.plan-name.blue { color: #2563eb; }
.plan-name.purple { color: #7c3aed; }
.plan-name.green { color: var(--primary); }
.plan-name.orange { color: #ea580c; }

.plan-traffic {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 16px;
  font-weight: 600;
}

.plan-price-box {
  margin-bottom: 24px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-light);
}

.plan-price {
  font-size: 2rem;
  font-weight: 800;
  color: var(--text-main);
}

.plan-unit {
  font-size: 0.9rem;
  color: var(--text-light);
  font-weight: 500;
}

.plan-features {
  margin-bottom: 28px;
  flex-grow: 1;
}

.plan-feature-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 10px;
}

.plan-feature-item svg {
  color: var(--accent);
  flex-shrink: 0;
}

/* 用户群体 / 使用场景 */
.scenarios-section {
  padding: 90px 0;
  background-color: #ffffff;
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.scenarios-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.scenario-card {
  background: var(--bg-subtle);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  transition: var(--transition);
}

.scenario-card:hover {
  background: #ffffff;
  border-color: var(--primary-border);
  box-shadow: var(--shadow-md);
}

.scenario-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 8px;
}

.scenario-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* 用户评价 Carousel 模块 (参考图4) */
.reviews-section {
  padding: 90px 0;
}

.reviews-carousel-container {
  position: relative;
  overflow: hidden;
  padding: 10px 0;
}

.reviews-track {
  display: flex;
  gap: 24px;
  transition: transform 0.4s ease-in-out;
}

.review-card {
  min-width: calc(33.333% - 16px);
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 32px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.quote-icon {
  color: var(--primary);
  font-size: 2rem;
  line-height: 1;
  margin-bottom: 16px;
  opacity: 0.8;
}

.review-text {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 24px;
}

.review-user {
  display: flex;
  align-items: center;
  gap: 12px;
  border-top: 1px solid var(--border-light);
  padding-top: 16px;
}

.user-avatar {
  width: 42px;
  height: 42px;
  background-color: var(--primary-light);
  color: var(--primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
}

.user-info-name {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-main);
}

.user-info-role {
  font-size: 0.8rem;
  color: var(--text-light);
}

.carousel-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-top: 36px;
}

.carousel-btn {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid var(--border-color);
  background-color: #ffffff;
  color: var(--text-main);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition);
}

.carousel-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
  background-color: var(--primary-light);
}

/* 文章站 Grid 模块 */
.articles-section {
  padding: 90px 0;
  background-color: var(--bg-subtle);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.article-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
}

.article-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary-border);
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.8rem;
  color: var(--text-light);
  margin-bottom: 12px;
}

.article-tag {
  background-color: var(--primary-light);
  color: var(--primary);
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  font-weight: 600;
}

.article-title-h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.4;
  margin-bottom: 12px;
}

.article-summary {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 20px;
  flex-grow: 1;
}

.article-link-btn {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--primary);
  display: flex;
  align-items: center;
  gap: 6px;
}

/* 常见答疑 FAQ (参考图5) */
.faq-section {
  padding: 90px 0;
}

.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background-color: #ffffff;
  overflow: hidden;
  transition: var(--transition);
}

.faq-question {
  width: 100%;
  padding: 20px 24px;
  background: none;
  border: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-main);
  text-align: left;
  cursor: pointer;
}

.faq-icon {
  width: 20px;
  height: 20px;
  transition: transform 0.3s ease;
  color: var(--text-light);
}

.faq-item.active .faq-icon {
  transform: rotate(180deg);
  color: var(--primary);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
  padding: 0 24px;
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.65;
}

.faq-item.active .faq-answer {
  max-height: 300px;
  padding: 0 24px 20px 24px;
}

/* 页脚设计 */
.footer {
  background-color: #ffffff;
  border-top: 1px solid var(--border-color);
  padding: 70px 0 30px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 60px;
}

.footer-brand-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-top: 16px;
  max-width: 320px;
  line-height: 1.6;
}

.footer-col-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 20px;
}

.footer-menu {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-menu a {
  font-size: 0.875rem;
  color: var(--text-muted);
  transition: var(--transition);
}

.footer-menu a:hover {
  color: var(--primary);
}

.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid var(--border-light);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--text-light);
}

/* 文章详情页专属排版规范 */
.article-container {
  max-width: 860px;
  margin: 40px auto 80px;
  padding: 0 24px;
}

.article-header {
  margin-bottom: 40px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-color);
}

.article-breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.875rem;
  color: var(--text-light);
  margin-bottom: 16px;
}

.article-content {
  font-size: 1.05rem;
  line-height: 1.8;
  color: #1e293b;
}

.article-content h1 {
  font-size: 2.4rem;
  font-weight: 800;
  line-height: 1.25;
  color: var(--text-main);
  margin-bottom: 20px;
}

.article-content h2 {
  font-size: 1.65rem;
  font-weight: 700;
  color: var(--text-main);
  margin: 44px 0 20px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--primary-light);
}

.article-content h3 {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-main);
  margin: 32px 0 16px;
}

.article-content p {
  margin-bottom: 20px;
}

.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 28px 0;
  font-size: 0.95rem;
}

.article-content th, .article-content td {
  padding: 14px 18px;
  border: 1px solid var(--border-color);
  text-align: left;
}

.article-content th {
  background-color: var(--bg-subtle);
  font-weight: 700;
  color: var(--text-main);
}

.article-content tr:nth-child(even) {
  background-color: #fafbfc;
}

.article-content blockquote {
  border-left: 4px solid var(--primary);
  background-color: var(--primary-light);
  padding: 16px 20px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 24px 0;
  font-size: 0.98rem;
  color: var(--primary-hover);
}

.article-content ul, .article-content ol {
  margin-bottom: 24px;
  padding-left: 24px;
}

.article-content li {
  margin-bottom: 8px;
}

.article-cta-box {
  background: linear-gradient(135deg, var(--primary-light) 0%, #d1fae5 100%);
  border: 1px solid var(--primary-border);
  border-radius: var(--radius-md);
  padding: 32px;
  margin: 48px 0;
  text-align: center;
}

.article-cta-title {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--primary-hover);
  margin-bottom: 12px;
}

.article-cta-desc {
  font-size: 1rem;
  color: var(--text-muted);
  margin-bottom: 20px;
}

/* 响应式断点控制 */
@media (max-width: 1024px) {
  .hero-grid { grid-template-columns: 1fr; }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .pricing-grid { grid-template-columns: repeat(2, 1fr); }
  .scenarios-grid { grid-template-columns: repeat(2, 1fr); }
  .articles-grid { grid-template-columns: repeat(2, 1fr); }
  .review-card { min-width: calc(50% - 12px); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 640px) {
  .nav-links { display: none; }
  .hero-title { font-size: 2.2rem; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
  .features-grid { grid-template-columns: 1fr; }
  .pricing-grid { grid-template-columns: 1fr; }
  .scenarios-grid { grid-template-columns: 1fr; }
  .articles-grid { grid-template-columns: 1fr; }
  .review-card { min-width: 100%; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; gap: 12px; text-align: center; }
}